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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Mon, Jul-09-2018, 08:00:25 PM   #1
inferno493
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Default Converting side strakes to real vents

Does anyone know if there is information floating around out there about how you might go about opening up the side vents to the engine bay? I have a supercharger which causes overheat issues on hot days / high altitudes and I don't really want to go the vented hood route. The left side vent looks like it would be difficult but the right side seems open enough to run some ducting from the vent, through the corner chamber and right into the heart of the engine bay. It seems like there's not really anyplace for incoming air to leave and that opening those vents could really reduce air temps in there.
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Old Mon, Jul-09-2018, 08:13:43 PM   #2
///M3 MD
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Default Re: Converting side strakes to real vents

From what I recall the ducts were originally designed to be functional but didnít result in any measurable increase in airflow. That being said, this was with the stock motor and temps, not sure if anyone has revisited this. Maybe some of the more seasoned pros can chime in?


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Old Mon, Jul-09-2018, 08:39:25 PM   #3
twentyseven
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Default Re: Converting side strakes to real vents

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Originally Posted by ///M3 MD View Post
From what I recall the ducts were originally designed to be functional but didn’t result in any measurable increase in airflow. That being said, this was with the stock motor and temps, not sure if anyone has revisited this. Maybe some of the more seasoned pros can chime in?


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They were originally intended to be functional, but were not needed. Corporate liked the look so they were left in place as visual design cues.

Would take some crafty fab work to make them functional vents; just not sure if there is a low pressure zone there to extract the heat since there is nothing is ducted around the SC..
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Old Mon, Jul-09-2018, 11:23:38 PM   #4
inferno493
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Default Re: Converting side strakes to real vents

What I figure is that if the car is moving the increase in velocity over the vent will create a decrease in pressure in relation to the engine bay, especially considering the pressure created by air flowing through the grill, radiator and intercooler while in motion. That should allow greater airflow and increased effectiveness of the cooling system while retaining a stock exterior.
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Old Tue, Jul-10-2018, 10:55:11 PM   #5
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Default Re: Converting side strakes to real vents

i've thought about this also. given the location of the vents is not conducive to extracting engine bay air (the 2 compartments are in the way of that), the best use for the side vents would be to extract air in the wheel arch area. that is comparatively easy to fab (a pair of 3d printed guides would do the trick).
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Old Wed, Jul-11-2018, 12:45:38 AM   #6
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Default Re: Converting side strakes to real vents

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Originally Posted by M3 dude View Post
i've thought about this also. given the location of the vents is not conducive to extracting engine bay air (the 2 compartments are in the way of that), the best use for the side vents would be to extract air in the wheel arch area. that is comparatively easy to fab (a pair of 3d printed guides would do the trick).
Other than a vented hood, what are some effective ways to get rid of the heat?
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Old Wed, Jul-11-2018, 03:19:19 AM   #7
icecream
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Default Re: Converting side strakes to real vents

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Other than a vented hood, what are some effective ways to get rid of the heat?
Remove the cabin air filter housing on track days??
Unless its overheating in general.
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Old Wed, Jul-11-2018, 03:58:49 AM   #8
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Default Re: Converting side strakes to real vents

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Remove the cabin air filter housing on track days??
Unless its overheating in general.
wouldnt think that would work. that is an intake - its in a high pressure area
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Old Thu, Jul-12-2018, 03:52:02 AM   #9
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Default Re: Converting side strakes to real vents

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Originally Posted by M3 dude View Post
i've thought about this also. given the location of the vents is not conducive to extracting engine bay air (the 2 compartments are in the way of that), the best use for the side vents would be to extract air in the wheel arch area. that is comparatively easy to fab (a pair of 3d printed guides would do the trick).
That's not a bad idea. Especially for a guys like me with the SGT CSL bumper. I don't track the M3 but for those that do, the wheel arch to vent idea is not bad!
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Discussing Converting side strakes to real vents in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)